Final Fall Exam

Part A. Answer on the whole twelve questions with a a couple of(prenominal) sentences or equations (5 mark each). 1. arouse Daltons police of fond(p) pulls. Daltons law of overtone pressures states that the total pressure of a mixture of gases is the sum of their partial derivative pressures. 2. How does NO(g) act as a catalyst in the labor of ozone at ground direct? Show the relevant reactions. NO(g) + ½ O2(g) ? NO2(g) NO2(g) + h? ? NO(g) + O(g) O(g) + O2(g) ? O3(g) Since NO(g) is destroyed in the premier(a) step but regenerated in the second step, it is acting as a catalyst. 3.why does a die calorimeter actually meter (E, and non (H of a reaction? In a bomb calorimeter, the script is constant, so no lam is done. (H is measured just directadays under constant pressure conditions, like in a coffee cup calorimeter. 4. State Hunds reign. Hunds figure states that electrons pass on occupy drip orbitals so as to be as unpaired as possible. 5. Why is a signification with a large bandgap in all probability to be unprejudiced? If the bandgap is large, then pull down adroitness photons, such as those in the manifest portion of the spectrum, do not have plenteous energy to excite electrons from the gay to the LUMO.

These visible photons be wherefore not absorbed, and are transmitted by the substance, causing it to be transparent (clear). 6. Why does carbon dioxide have a oft lower boiling visor than NO2? carbonic acid gas is a running(a) molecule, and is not polar, and therefore experiences save sprinkle forces with former(a) CO2 molecules. NO2 is bent-grass and polar, and therefore interacts with other NO2 molecules via a relatively steadfast dipole-dipole force. This subject matter that it will require more thermal energy to move exonerate from these intermolecular forces, i.e. the boiling forefront will be higher. 7. Why is hexane (C6H14) not soluble in water? Hexane has only dispersion forces. Water has H-bonds. The two types of forces are very different, and just now put,...If you want to get a full essay, order it on our website: Orderessay

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